Can't Install Adobe Flash on Kubuntu

I'm running Kubuntu 12.04 on a Mac G4 Powerbook. I took the right download from the Adobe website and opened the instructions. I've opened a Terminal but on reading the instructions I'm simply confused. I'm guessing this is a relitively simple task but I've never used a Terminal to do anything before and never used Linux.

A few examples of my confusion...

Unpack the plugin tar.gz and copy the files to the appropriate location. - What is the appropriate location ?
Save the plugin tar.gz locally and note the location the file was saved to. - If they are copied to the appropriate location already, why do I need to save them locally?
Launch terminal and change directories to the location the file was saved to. - How do I change directories in the Terminal?
Identify the location of the browser plugins directory, based on your Linux distribution and Firefox version - Being new to Linux and as such Dolphin I'm struggling with this
Copy libflashplayer.so to the appropriate browser plugins directory. At the prompt type: + cp libflashlayer.so <BrowserPluginsLocation> - This bit I actually get. Hurah!!
Copy the Flash Player Local Settings configurations files to the /usr directory. At the prompt type: + sudo cp -r usr/* /usr - This bit I don't get at all....

Could someone please take the time to help by explaining step-by-step what to do and how to do it. I tried posting on the Kubuntu community forum for new guys but no one has helped. It's frustrating because I can see this is a very simple task if you know what you're doing. Sadly I don't....

Thanks, Rob :)